Unit10语法专项物主代词一般过去时（Ⅱ）课件仁爱科普版七年级英语下册

教学课件新仁爱版七年级下册

Unit10语法专项——物主代词&一般过去时（Ⅱ）

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学习目标掌握物主代词的分类、形式及核心用法区别熟练运用be动词和实义动词的一般过去时各类句式能区分并正确使用形容词性和名词性物主代词完成一般过去时的否定、疑问及各类句式转换题型结合语境综合运用两大语法，规避常见使用错误一、物主代词-核心概念物主代词是表示所属关系的代词，表“……的”含义分为形容词性和名词性两类，二者用法差异显著形容词性物主代词需后接名词，在句中充当定语成分名词性物主代词可单独使用，能作主语、宾语或表语判断使用类型的核心：看空格后是否有名词修饰物主代词-完整形式对照表人称形容词性物主代词名词性物主代词例句对比第一人称单数mymineThisismypen.→Thispenismine.第二人称单数youryoursIsthisyourbike?→Isthisbikeyours?第三人称单数his/her/itshis/hers/itsThatishisdog.→Thatdogishis.第一人称复数ouroursThisisourhouse.→Thishouseisours.第二人称复数youryoursAretheseyourbooks?→Arethesebooksyours?第三人称复数theirtheirsThosearetheirtoys.→Thosetoysaretheirs.物主代词-形容词性用法详解核心特征为必须后接名词，不能在句中单独使用在句中作定语，作用是修饰后面的名词，表所属Thisismypen.my修饰pen，表“我的笔”Herbagispink.her修饰bag，表“她的包”Theirclassroomisbig.their修饰classroom，表“他们的教室”物主代词-名词性用法详解核心特征为可单独使用，后面不能再接名词在句中可作主语、宾语或表语，替代“形物代+名词”Thispenismine.mine=mypen，在句中作表语Yoursisonthedesk.yours=yourbook，在句中作主语Ilikehers.hers=herbike，在句中作宾语物主代词-核心用法对比Thisisyourruler.→Thisrulerisyours.Thatisourhouse.→Thathouseisours.Thosearetheirtoys.→Thosetoysaretheirs.Itishisdog.→Itishis.名词性物主代词的本质，是替代前文出现的“形物代+名词”物主代词-高频易错点形容词性物主代词单独使用，如Thisismy.属于错误表达名词性物主代词后接名词，如Thebookisminebook.冗余错误混淆his的用法，his可接名词也可单独用，无需额外变形your兼具“你的”和“你们的”含义，需结合语境判断单复数物主代词-基础小练（填空）根据句意，用所给代词的适当形式填空1.Thisis________(I)teacher.Thecupis________(she).2.—Isthis________(you)bag?—Yes,it’s________(I).3.Thedogis________(they).________(they)dogisblack.4.Theseare________(we)pens.Thoseare________(you).myyourminetheirsTheirouryourshers二、一般过去时（Ⅱ）-核心概念回顾表示过去某个时间发生的动作或存在的状态常与明确的过去时间状语连用，时态判断关键看时间本单元重点掌握be动词和实义动词的否定、疑问句式be动词过去式分was和were，实义动词需借助did变形常见时间标志词：yesterday、lastweek、justnow、threedaysago一般过去时（Ⅱ）-be动词的句式结构be动词过去式分两种：was用于单数，were用于复数肯定句：主语+was/were+其他成分否定句：主语+was/were+not，可缩写为wasn’t/weren’t疑问句：Was/Were+主语+其他成分？回答需保持时态一致，疑问句中I/we对应的be动词用were一般过去时（Ⅱ）-be动词句式例句结合具体例句，理解不同句式的实际用法Iwasathomeyesterday./Theywereintheparkjustnow.Shewasn’thappylastnight./Weweren’tlateforschool.WasheinBeijingyesterday?/Wereyoubusylastweekend?—Wereyouattheparty?—Yes,Iwas./No,Iwasn’t.一般过去时（Ⅱ）-实义动词的句式结构实义动词的否定、疑问句式，需借助助动词did完成肯定句：主语+动词过去式+其他成分否定句：主语+didn’t+动词原形+其他成分疑问句：Did+主语+动词原形+其他成分？回答：Yes,主语+did./No,主语+didn’t.did体现过去时态，后面的实义动词必须用原形一般过去时（Ⅱ）-实义动词句式例句结合例句强化理解，注意动词形式的正确变化WeplantedtreeslastSaturday./Hereadabookyesterday.Theydidn’twatertheflowers./Ididn’tridemybiketoschool.Didyouhelpyourmom?/Didtheyhaveagoodtime?—Didyougotothezoo?—Yes,Idid./No,Ididn’t.一般过去时-动词过去式变化规则回顾规则变化一般动词直接加ed：plant→planted，water→watered以e结尾的动词直接加d：like→liked，live→lived辅音字母+y结尾，变y为i再加ed：study→studied，carry→carried重读闭音节结尾，双写尾辅音再加ed：stop→stopped，plan→planned一般过去时-高频不规则动词（本单元重点）不规则动词无固定变化规则，需要逐个熟记do→did；go→went；have→had；dig→dugride→rode；make→made；see→saw；say→saidtake→took；put→put；read→read；write→wroteput、read的过去式与原形拼写完全一致，注意发音变化一般过去时（Ⅱ）-高频易错点（be动词）单复数混淆，出现Hewerelate.这类错误表达否定形式错写，如Iwasnotn.正确形式为Iwasn’t.疑问句be动词位置错误，如Youwereathome?需将be动词提至句首回答时态不一致，如—Wasshehere?—Yes,sheis.需用过去式回应一般过去时（Ⅱ）-高频易错点（实义动词）否定句中实义动词用过去式，如Ididn’twateredtheflowers.疑问句中实义动词用过去式，如Didyouwenttothepark?肯定句中重复使用助动词，如Hedidplayedfootball.重读闭音节动词变形，漏双写尾辅音，如stop→stoped一般过去时（Ⅱ）-基础小练1（be动词）按要求完成句子，注意was和were的正确使用1.I________(be)atschoolyesterdaymorning.2.They________(notbe)happylastnight.3.________(be)yourbrotherathomejustnow?4.—Wereyouinthelibrary?—No,I________(notbe).wasweren’tWaswasn’t一般过去时（Ⅱ）-基础小练2（实义动词）用所给动词的适当形式填空，注意句式变化规则1.She________(plant)atreelastweekend.2.We____________(notwater)theflowersyesterday.3.________(do)you________(dig)aholejustnow?4.—Didhe________(ride)abike?—Yes,he________(do).planteddidn’twaterDiddigridedid物主代词&一般过去时-综合小练1（填空）1.________(we)classroomisclean,and________(they)isbigtoo.2.He____________(nothelp)hisfriendyesterday.Hisfriend’sbikeis________(he).3.—Isthis________(you)pen?—Yes,I________(buy)itlastweek.4.Thefoodis________(we).We________(have)apicnicyesterday.Ourtheirsdidn’thelphisyourboughtourshad物主代词&一般过去时-综合小练2（单项选择）1.Thisbookis________.Iboughtityesterday.A.myB.mineC.meD.I2.—________youatthepartylastnight?—Yes,I________.A.Are;amB.Was;wasC.Were;wasD.Were;were3.They________TVlastnight.Theyreadbooksinstead.A.didn’twatchB.don’twatchC.didn’twatchedD.notwatch4.—Isthisbike________?—Yes,it’s________bike.A.hers;herB.her;hersC.hers;hersD.her;herBCAA一般过去时（Ⅱ）-句式转换小练1将下列句子改为否定句，严格遵循句式变化规则1.Hewasintheparkjustnow.2.Theyplantedtreesinthecommunity.3.Wewerelateforschoolyesterday.4.Sherodeabiketothezoolastweekend.Hewasn’tintheparkjustnow.Theydidn’tplanttreesinthecommunity.Weweren’tlateforschoolyesterday.Shedidn’trideabiketothezoolastweekend.一般过去时（Ⅱ）-句式转换小练2将下列句子改为一般疑问句，并作肯定和否定回答1.Iwasathomelastnight.2.Hedidhishomeworkyesterday.3.Theywerehappyattheparty.4.Wewenttothegardenjustnow.Wereyouathomelastnight?Yes,Iwas./No,Iwasn’t.Didhedohishomeworkyesterday?Yes,hedid./No,hedidn’t.Weretheyhappyattheparty?Yes,theywere./No,theyweren’t.Didyougotothegardenjustnow?Yes,wedid./No,wedidn’t.物主代词&一般过去时-拓展小练（语篇填空）根据短文内容，用所给词的适当形式填空LastSaturday,________(we)classwenttothepark.Theparkisbeautiful,and________(it)flowersarecolorful.We________(dig)holesand________(plant)manytrees.Somestudents________(water)theyoungtrees.Thefoodforlunchwas________(we),andthefruitwas________(they).We________(be)alltiredbuthappy.ouritsdugplantedwateredourstheirswere物主代词&一般过去时-挑战小练（对划线部分提问）Thisismy

book.Theyplayedfootballlastweekend.Hewenttothepark

yesterday.Sheboughtapen

intheshop.Wewerelatebecausewegotuplate.Whosebookisthis?Whendidtheyplayfootball?Wheredidhegoyesterday?Whatdidshebuyintheshop?Whywereyoulate?物主代词&一般过去时-综合挑战练（句型转换）1.Thisisherruler.（改为同义句）2.Wehadagoodtimelastweek.（改为否定句）3.HewasinShanghaiyesterday.（改为一般疑问句并回答）4.Theyrodebikestoschooljustnow.（对划线部分提问）5.Thebagismine.（对划线部分提问）Thisrulerishers.Wedidn’thaveagoodtimelastweek.WasheinShanghaiyesterday?Yes,hewas./No,hewasn’t.Whatdidtheydo